To upgrade an iServer earlier than Release 8 Service Pack 1, you must first upgrade to Release 11 Service Pack 4, then migrate to iHub by performing a side‑by‑side installation, as described in Chapter 4, “Migrating to BIRT iHub.”

The upgrade program preserves any previous iServer configuration information and reuses the earlier settings. The installation program resolves any differences in default values between releases, ignoring old configuration defaults in favor of new default values. For example, the installation does not prompt the user for port information and machine name. The installation detects the current port numbers and machine name and keeps those settings.